Year 10 GCSE PE - PowerPoint PPT Presentation

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Year 10 GCSE PE

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Year 10 GCSE PE A healthy, active lifestyle and your muscular system Starter Label the diagram provided with the muscles learnt last lesson. Learning Objectives 1. – PowerPoint PPT presentation

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Title: Year 10 GCSE PE


1
Year 10 GCSE PE
  • A healthy, active lifestyle and your muscular
    system

2
Starter
Label the diagram provided with the muscles
learnt last lesson.
3
Learning Objectives
1. Can I explain the role of the muscular system
during physical activity? (continued) 2. Can I
explain the difference between isometric and
isotonic muscle contractions?
4
Movements at joints
Flexion - The bending of a joint so that the
bones forming the joint are brought closer
together.
Extension - The straightening of a joint so that
the bones forming the joint are moved farther
apart
5
Movements at joints
Abduction - to move away from the midline plane
of the body
Adduction to bring back towards the midline
plane of the body
6
Muscle action table
Muscle Muscle action
Trapezius Rotates shoulder joint
Gastrocnemius Plantar flexion of the foot (pointing your toes)
Latissimus dorsi Draws the arm back and in towards the body
Abdominals Flex, rotate and bend the trunk
Gluteals Extend the leg at the hip
7
Task
  • In your pairs, discuss the sporting example
    provided on the picture
  • - What joint is the movement occurring at?
  • - What movement has occurred at the joint?
  • - Which muscle is contracting?
  • - Which muscle is relaxing?

8
Types of Muscle Contractions
  • There are two types of muscle contractions you
    need to know about
  • 1). Isometric contractions
  • 2). Isotonic Contractions (of which there are two
    types)

9
Muscle Contraction (Isometric)
  • Muscles contract in 3 ways
  • When muscles are working but stay the same length
    this is called isometric contraction. There is no
    movement
  • The arms can now work effectively to complete the
    exercise

10
Muscle Contraction (Isotonic)
  • In Isotonic contractions our muscles create
    movement as they contract
  • There are two types of Isotonic contraction
  • When a muscle shortens as it contracts this is
    called a concentric contraction
  • An example of this would be the bicep when
    lifting the weight while doing a curl
  • When a muscle lengthens while still being tense
    this is called an eccentric contraction
  • This happens as you lower the weight under
    control while doing a curl

11
Homework
Complete the exam questions. Due in Thursday 8th
May.
12
Plenary
  • One partner to perform a movement with a body
    part the other partner to identify the muscle
    contracting
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